Sociology of Conspiracy Theory: Nazis, Lizard People, and the Hollow Earth
The Earth is hollow. You can get in it through massive holes at the North and South poles. The Nazis escaped to the center of the Earth after they lost the Second World War. Also, a race of lizard people live in the center of the Earth. Also, those lizards may have helped the Nazis all along. And they can shape shift to look like humans.